TY  - BOOK
AU  - Elliot,Sergio
ED  - Food and Agriculture Organization of the United Nations (Rome),
TI  - Distance education systems
SN  - 9251024480 (pbk.)
U1  - 330 
PY  - 1990///
CY  - Rome
PB  - Food and Agriculture Organization of the United Nations
KW  - Distance education
KW  - Instructional systems
KW  - Design
KW  - Learning
N1  - Includes bibliographical references
ER  -